Lightcurve datamodel?
Mireille LOUYS
mireille.louys at unistra.fr
Fri Jun 14 16:52:49 CEST 2024
Hi Kelle, Mark,
Hi Igor,
Hi DMers ,
In the revision of Obscore 1.1 , I did provide a mapping for ObsCore
attributes to FITS keywords for the Binospec project .
That was a request from Igor Chilingarian to map the data produced to
ObsCore seemlessly.
I don't know today what has been used in the archive , but Igor may help
to correct and give feedback.
Here attached is the first mapping table proposed .
The Time extension for ObsCore is not covered yet in this table.
Eager to help for this ,
Best regards , Mireille
Le 13/06/2024 à 21:17, CresitelloDittmar, Mark via dm a écrit :
> Sweet!
> I do think that would be very handy for providers just now defining
> their products.
>
> The Notes are pretty open contributions..
> The first step would be to create a repository for it at:
> https://github.com/ivoa
> If you go there, you'd see the HEIG Note repo as a good/recent
> addition example.
>
> I would be able to create the repo, but don't have the time (at least
> not today) to put together the document framework.
> Mark
>
>
>
> On Thu, Jun 13, 2024 at 3:00 PM Kelle Cruz <kellecruz at gmail.com> wrote:
>
> I would be happy with an IVOA Note for FITS serializations!
>
> And yes, it could also list multiple keywords that are in use for
> various concepts. And this oldie but goodie list of Commonly Used
> FITS keywords can also serve as inspiration. I note that this
> document also includes a reference to which institution initially
> adopted it/defined it.
>
> How does one go about writing an IVOA Note? As you can tell, I'm
> eager to contribute.
>
> Kelle
>
> On Thu, Jun 13, 2024 at 2:47 PM CresitelloDittmar, Mark
> <mdittmar at cfa.harvard.edu> wrote:
>
> Kelle,
>
> For quick reference, this PDF came from:
> https://wiki.ivoa.net/twiki/bin/view/IVOA/ImageDM
> That's along the lines of what I meant..
>
> Optimally, I think this is best provided as an IVOA Note for
> FITS serializations (rather than within an ObsCore level
> standard), that could somehow consolidate the model concepts
> which are repeated in some of these early models, and suggest
> a FITS name for it. If done well, it would track down and
> integrate existing dictionaries like the MAST one you point to
> in the Issue
> (https://outerspace.stsci.edu/display/MASTDOCS/Light-curve+Metadata).
>
> Mark
>
>
>
>
> On Thu, Jun 13, 2024 at 2:22 PM Kelle Cruz
> <kellecruz at gmail.com> wrote:
>
> I also found this PDF which is SUPER USEFUL! It seems to
> be part of the idle ImageDM project. Is there any reason
> not to use this table as a guide?
>
> btw, I'm updating the table in the issue as I figure
> things out:
> https://github.com/ivoa-std/ObscoreTimeExtension/issues/8
>
> Thanks,
> Kelle
>
> On Thu, Jun 13, 2024 at 12:41 PM Kelle Cruz
> <kellecruz at gmail.com> wrote:
>
> What if instead of saying “standard” keywords, we call
> them “suggested“ and make the table an appendix? That
> way, we’re not saying people need to “recast” their
> FITS files, but we are providing useful information
> for folks generating new data products?
>
> There’s a real opportunity here to make it easier for
> the “common” astronomer to implement and adopt VO-type
> concepts and methods which improve data accessibility
> and reusability. Providing FITS keyword suggestions is
> immediately useful to lots of folks and would be seen
> as a positive benefit of the VO.
>
> kelle (via iOS)
>
>
> On Thu, Jun 13, 2024 at 12:24 PM CresitelloDittmar,
> Mark <mdittmar at cfa.harvard.edu> wrote:
>
> Kelle,
>
> Regarding the issue you posted on the
> ObsCoreTimeExtension repo.
> https://github.com/ivoa-std/ObscoreTimeExtension/issues/8
>
> I thought you might hit this problem since you're
> looking for standard FITS keywords for your
> lightcurves.
> The ObsCore standard (and extensions) are targeted
> toward Data Discovery threads, which pass the
> information around in VOTables annotated with UTypes.
> As such, that probably isn't a good place to put
> corresponding FITS keywords.
>
> There are very few models targeting Data Products,
> and even there, I think only Spectrum includes
> FITS serialization specs. In general, the data
> models should be independent of serialization
> standards, and that is the direction we have been
> moving towards in the newer, vo-dml compliant models.
>
> It sounds like what you are looking for is a
> mapping from the ObsCore (and extension) UTypes to
> a VO recommended FITS keyword.. which I don't
> believe exists other than what is defined in
> Spectrum. Or perhaps preferably a FITS
> serialization standard which maps model concepts
> to FITS key/column specs... which certainly
> doesn't exist in the VO.
>
> I think the idea has been:
> * Everybody uses different FITS keywords to
> serialize their data
> * We need to standardize something for Data
> Discovery that doesn't force everyone to recast
> their FITS files
> * So we'll communicate in VOTable and tag the
> concepts with UTypes
> + data providers can then map their
> individual keywords to the ObsCore standard UTypes.
>
> I'm afraid this isn't a very encouraging email..
> I'm not sure what to recommend for you.
> Anyone.. Please correct me if I've missed a
> resource that would be helpful here.
>
> Mark
>
>
>
>
>
> On Wed, Jun 12, 2024 at 8:28 AM Kelle Cruz via dm
> <dm at ivoa.net> wrote:
>
> This document has what I’m looking for!
> Thanks everyone.
>
> https://github.com/ivoa-std/ObscoreTimeExtension/blob/master/ObscoreTimeExtension.pdf
>
> kelle (via iOS)
>
>
> On Wed, Jun 12, 2024 at 3:59 AM BONNAREL
> FRANCOIS <francois.bonnarel at astro.unistra.fr>
> wrote:
>
> Hi,
>
> Ada and I wrote in parallel, but we are
> pointing to the same IVOA note !
>
> Best regards
>
> François
>
> Le 12/06/2024 à 09:57, NEBOT GOMEZ-MORAN
> Ada (OBS) via dm a écrit :
> > Hi Kelle,
> >
> > we wrote this note some time ago:
> >
> >
> https://www.ivoa.net/documents/Notes/LightCurveTimeSeries/20231122/TimeSeries.pdf
> >
> > but it didn’t get much attention so I
> haven’t made any effort on making
> improvements / changes to it for some time.
> >
> > Let me know if this goes in the lines of
> your needs!
> >
> > Cheers,
> > Ada
> >
> > ----- Mail d’origine -----
> > De: Kelle Cruz via dm <dm at ivoa.net>
> > À: dm at ivoa.net
> > Envoyé: Tue, 11 Jun 2024 22:34:39 +0200
> (CEST)
> > Objet: Lightcurve datamodel?
> >
> > Hi folks,
> >
> > I'm working on wrangling some
> lightcurves into a "standard" format. is
> > there a good reference document for a
> lightcurve datamodel? At this point,
> > I'm mostly just interested in header
> keywords.
> >
> > Thanks,
> > Kelle
> >
> > --
> > Kelle Cruz, PhD (she/her, they/them)
> > Assoc. Professor, Physics and Astronomy,
> Hunter College
> > CEO, ScienceBetter Consulting, LLC
> > CFO, Startorialist, Inc.
> <http://shop.startorialist.com>
> > Editor-in-Chief, AstroBetter Blog and
> Wiki <http://astrobetter.com>
> > Research Associate, American Museum of
> Natural History
> > Visiting Scholar, Flatiron Institute
> >
>
--
--
Mireille Louys, MCF (Associate Professor)
Centre de données CDS Images, Laboratoire ICube &
Observatoire de Strasbourg Telecom Physique Strasbourg
11 rue de l'Université 300, Bd Sebastien Brandt CS 10413
F- 67000-STRASBOURG F-67412 ILLKIRCH Cedex
Tel: +33 3 68 85 24 34
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.ivoa.net/pipermail/dm/attachments/20240614/ae64b0bd/attachment-0001.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: ObscoreFitsKW-8Mars2017.xlsx
Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Size: 17555 bytes
Desc: not available
URL: <http://mail.ivoa.net/pipermail/dm/attachments/20240614/ae64b0bd/attachment-0001.xlsx>
More information about the dm
mailing list